From 2ff0db9a9b047d1c94ddbeea010561d1b9032101 Mon Sep 17 00:00:00 2001 From: Dirk Ziegelmeier Date: Thu, 6 Dec 2018 14:40:57 +0100 Subject: [PATCH] Fix bug #55171: Binding UDP PCB with different IP type PCBs does not work by additionally checking IP address type --- src/core/udp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/core/udp.c b/src/core/udp.c index 7c25912e..54be79d5 100644 --- a/src/core/udp.c +++ b/src/core/udp.c @@ -997,8 +997,10 @@ udp_bind(struct udp_pcb *pcb, const ip_addr_t *ipaddr, u16_t port) { /* port matches that of PCB in list and REUSEADDR not set -> reject */ if ((ipcb->local_port == port) && + (IP_GET_TYPE(&ipcb->local_ip) == IP_GET_TYPE(ipaddr)) && /* IP address matches or any IP used? */ - (ip_addr_cmp(&ipcb->local_ip, ipaddr) || ip_addr_isany(ipaddr) || + (ip_addr_cmp(&ipcb->local_ip, ipaddr) || + ip_addr_isany(ipaddr) || ip_addr_isany(&ipcb->local_ip))) { /* other PCB already binds to this local IP and port */ LWIP_DEBUGF(UDP_DEBUG,